Someone who's infuriated is really angry. An infuriated driver can be dangerous and slip into acts of road rage. Steer clear!
If you've ever been incredibly mad, you know what it is to be infuriated. Your infuriated math teacher might make the whole class stay after school to retake a test, and an infuriated sister might slap her little brother across the face. Infuriated comes from the Italian infuriato, and ultimately from the Latin in furia, "in a fury."